Thanks a lot for the information. 737.org helped a lot, so are all replies above!
To tell you bit of extra info about this, I was flying a simulator session from VCBI to VOTR and an ILS approach to RWY 27 @ VOTR. I had to do a Go Around so I made a TOGA and suddenly TRNB 0152.4z appeared in the ND confusing me.
I am studying B1, but trying to get the whole concept of flying so I could understand more things when the aircraft is flying as now I spend more time with the aircraft when it is on ground
Thanks to all!